A Michigan woman sold a letter from Obama in October for $7,000 to help pay for her cancer treatment and for a down payment on a house.

"Thanks for the very kind and inspiring letter," Obama wrote to Jennifer Cline, after she told him in a letter that she was struggling to make ends meet and had lost her health insurance. "I know times are tough, but knowing there are folks out there like you and your husband gives me confidence that things will keep getting better!"

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About David Jackson

David's journalism career spans three decades, including coverage of five presidential elections, the Oklahoma City bombing, the 2000 Florida presidential recount and the 9/11 terrorist attacks. He has covered the White House for USA TODAY since 2005. His interests include history, politics, books, movies and college football -- not necessarily in that order. More about David